Swaging press

ABSTRACT

A swagging press having an upright hydraulic power head pivotal away from a fixed anvil to an inclined inoperative position, and slidably carrying a guide block which slidably carries a pair of swagging dies, which are readily replaced in the inoperative position of such power head.

United States Patent inventors John L. Williams P.0. Box 572;

Anton Dresden, 2430 S. W. Summit Court, both of Lake Oswego, Oreg. 97034 843,063

July 18, 1969 July 20, 1971 said Dresden, by said Williams Appl. No. Filed Patented Assignee SWAGING PRESS 7 Claims,6 Drawing Figs.

u.s. c1...., 72/447, 72/453, 100/231 in. C1 B2 13 9/06 Field of Search 72/446, 447,448,453; 100/231, 269

[56] References Cited UNITED STATES PATENTS 498,896 6/1893 Deyherle 72/453 971,208 9/1910 Mills 72/448 2,316,946 4/1943 Fischer 72/446 Primary Examiner-Charles W. Lanham Assistant Examiner-Gene P. Crosby Attorney-Buckhorn, Blore, Klarquist and Sparkman ABSTRACT: A swagging press having an upright hydraulic power head pivotal away from a fixed anvil to an inclined inoperative position, and slidably carrying a guide block which slidably carries a pair of swagging dies, which are readily replaced in the inoperative position of such power head.

PATENTED JUL20 ran 3 593; 562

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FIG 5 'l ii i 53 Egg SOL.

AN'JON DRESDEN JOHN L. WILLIAMS INVENTOES B) BUCK/10R, BLORE, KLAROU/ST 8 SPAR/(MAN ATTORNEYS SWAGING PRESS BODY OFVAPPLICATION Thisinvention relates to 'swagging presses and contemplates a press constructed to enable the dies to be quickly replaced by tilting a press unit from its operative to an inoperative position relative to a fixed anvil.

The press unit has a hydraulic piston and cylinder unit having trunnions which slip upwardly into frame slots so that the operational stresses are taken by the frame.

The press unit includes a guide block slidably engaging the piston rod and slidably supporting a pair of dies which are re'leasably retained in the guide block.

Various other objects of the invention will be apparent from the following description taken in connection with the accompanying drawings wherein:

FIG. 1 is a front elevational view of the swagging press and associated controls;

FIG. 2 is a side elevational view of the apparatus of FIG. 1;

FIG. 3 is an enlarged fragmentary front elevational view of the hydraulic swagging press;

FIG. 4 is a horizontal section taken along line 4-4 of FIG. 3;

FIG. 5 is a side elevational view of the upper portion of the press with parts broken back generally to midplane; the structure shown in broken lines being in the inoperative position;

FIG. 6 is a fragmentary sectional view taken along line 6-6 of FIG. 3; and

FIG. 7 is a schematic view of the hydraulic circuitry of the press.

FIGS. 1 and 2 show the hydraulic press P mounted on a bench 11, beneath which is a conventional hydraulic pump 13 for supplying hydraulic fluid under pressure to the .press through hoses 15 and 16. The supply is controlled by a foot valve 17.

The press P has a framework which comprises a pair of C- shaped body plates 21 and 23 joined by various crosspieces 25, 27 and 29 (FIGS. 1 and 5). An anvil 31 is supported by shoulder portions 33 of the body plates and by the lower crosspiece 25.

The press P has a tilting power head which includes a lower cylinder head 41 having trunnions 43 which fit within upwardly extending slots 45 (FIGS. 3 and 5). The latter are formed in the upper portions of the body plates 21 and 23. The trunnions 43 are retained in position by retainer bars 47.

There is an upper cylinder head 51, a cylinder shell 53, and four bolts which clamp the shell between the heads 41 and 51.

Hose 15 is connected to the lower head 41, while hose 16 is connected to the upper head 51.

The cylinder has a piston 59 (FIG. 7) having a cylinder rod 61 projecting downwardly through a seal 63 (FIGS. 3 and 5). The rod 61 carries an adjustment screw 65, which threads at its upper end into the rod 61 and has a depending stud 66 which slidably tits at its lower end in a recessed portion 67 of a cross slot 69 formed in a guide block 71.

The stud 66 contracts a spacer 75 which has flat sides slidably engaging the walls of the cross slot 69. The lower end of the spacer is cylindrically curved to fit within a cylindrically curved recess formed in the upper end of an upper die 77. The latter fits within a die bore which is formedthrough the guide block.

The upper die 77 is biasingly held in contact with the spacer 75 by a separable pushrod unit which includes a rod 81 which is slidably disposed in an inclined bore 83 formed in the guide block. The pushrod 81 projects downwardly into a larger bore 85 in the anvil 31 and there engages a headed pin 87. The latter is surrounded by a compression spring 89 which urges the pin and pushrod upwardly. The'pin projects through the anvil 31 and carries a cotter pin 91 to limit upward movement of the pin.

The pin 87 and pushrod 81 move upwardly and lift the die 77 each time the piston rod 61 is retraced upwardly. Thus the pushrod unit keeps the upper die 77 in contact with the spacer 75, and the spacer in contact with the adjustment screw 65.

A spring biased ball detent 95 is housed within a bore in the guide block 71 and engages a groove 97 in the pushrod 81 each time the rod rises. Despite this, the detent has no effect on the normal operation of the press. It comes into play when replacing the upper die 77, as will be explained presently.

There is a lower die 101 below the upper die 77, the lower die being releasably held in place by a thumb screw 103 which engages a flat on the lower die. This relationship assures register of a groove in the rear of the lower die with the pushrod 81 to accommodate the pushrod.

The guide block has a work-receiving slot 105 to receive work to be swaged, such as for instance, sailboat rope and cable fitting.

FIG. 7 schematically shows the hydraulic circuitry wherein the reversing valve 17 controls the supply and exhaust of fluid to and from the cylinder 53. A pressure relief valve 107 assuresa reasonably constant pressure to the cylinder.

In operation, the foot control 17 is depressed to raise the upper die 77 to permit a piece of work to be placed on the lower die 101. Then the foot control 17 is actuated to force the upper die downwardly to engage and deform the workpiece between the upper and lower dies. Then, the upper die is,

raised, the completed workpiece removed, and a subsequent workpiece placed on the lower die.

The dies 77 and 101 can be quickly replaced, when required. The piston 59 is raised, the upper die 77 and pushrod 81 followingsuch movement, with the detent 95 engaging the groove 97 in the rod. Note that the rod 81 is now in position to clear the anvil, upon outward movement of the power head.

A latch 111 (FIGS. 3 and 6) pivoted on the guideblock 71, is raised off a latch lug 113 on the anvil 31, to release the power head for outward tilting movement to the broken line position in FIG. 5. Note that guide block 71 is relieved at 115 to provide clearance for such movement.

The guide block 71 now can be pulled off the adjustment screw 66 (or the block will fall off of its own volition).

The thumbscrew 103 is loosened to release the lower die 101, which drops out the bottom of the guide block. Another lower die is slid into place and the thumbscrew tightened, The block is turned upside down to drop out the spacer 75 and the upper die 77. Another upper die can be slid into place, and the spacer replaced.

Now the power head is swung back to its operative position. In such position it rests against crosspiece 27 which acts as a rest block for the power head.

In the operative position of the power head, it is straddled by a pair of retainer pieces 121 (FIGS. 1 and 5) which act to stabilize the guide block and also retain the spacer 75 in position. The retainer pieces are shown in the form of angle plates welded to the crosspiece 27.

In the event that a shorter or longer upper die 77 is used, the adjustment screw 65 can be adjusted to accommodate the length of such die.

Note that the separating forces created by the press unit are transmitted directly from the trunnions 43 to the upper overhanging portions of the sideplates 21 and 23. The small retainer bars 47 take none of this stress, and merely prevent the cylinder from dropping.

What we claim is:

1. In a device of the class described,

a frame,

a power head mounted on the frame for movement from an operative position to an inoperative position,

said power head including a prime mover carried with the head,

means for supplying energy to said prime mover for accommodating movement of said power head from its operative to its inoperative position.

2. A device as in claim 1 wherein,

said power head includes a removable guideblock,

replaceable dies in said block,

said frame having an anvil disposed below said dies in the operative position of said power-head,

and retainer means for releasably retaining said power head in its operative position.

3. A device as in claim 2 wherein,

the prime mover is a hydraulic piston and cylinder unit, and

connecting means providing a sliding connection between the piston and said guide block to permit ready separation of said piston and guide block.

4. A device as in claim 3 wherein,

said connecting means includes an adjustment screw having a threaded connection with said piston and a sliding connection with said guide block.

5. A device as in claim 2 wherein said dies are slidably retained in said guide block,

a separable push rod unit contained partly in said anvil and partly in said guide block for waging said upper die to its upper position. 6. A device as in claim 3 wherein,

said piston and cylinder means includes a lower cylinder.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION 3 ,593 ,562 Dated J 1] 2Q I [21] John L. Williams and Anton Dresden Patent: No.

Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

[73] Assignee said Williams, by said Dresden Signed and sealed this 26th day of November 1974.

(SEAL) Attest:

McCOY M. GIBSON JR. Attesting Officer C. MARSHALL DANN Commissioner of Patents 

1. In a device of the class described, a frame, a power head mounted on the frame for movement from an operative position to an inoperative position, said power head including a prime mover carried with the head, means for supplying energy to said prime mover for accommodating movement of said power head from its operative to its inoperative position.
 2. A device as in claim 1 wherein, said power head includes a removable guide block, replaceable dies in said block, said frame having an anvil disposed below said dies in the operative position of said power head, and retainer means for releasably retaining said power head in its operative position.
 3. A device as in claim 2 wherein, the prime mover is a hydraulic piston and cylinder unit, and connecting means providing a sliding connection between the piston and said guide block to permit ready separation of said piston and guide block.
 4. A device as in claim 3 wherein, said connecting means includes an adjustment screw having a threaded connection with said piston and a sliding connection with said guide block.
 5. A device as in claim 2 wherein said dies are slidably retained in said guide block, a separable push rod unit contained partly in said anvil and partly in said guide block for waging said upper die to its upper position.
 6. A device as in claim 3 wherein, said piston and cylinder means includes a lower cylinder head and an upper cylinder head and a cylindrical shell clamped between said cylinder heads, said lower head having trunnions pivotally supported by said frame.
 7. A device as in claim 6, wherein said frame includes upwardly extending, downwardly opening slots to receive said trunnions, retainer means for releasably retaining said trunnions in said slots, whereby the stresses created by operation of said power head are taken by the blind ends of said slots. 